Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
40,063 detections
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Detects the use of PowerShell cmdlets (Add-MpPreference or Set-MpPreference) to modify Microsoft Defender exclusions (paths, processes, or extensions). This behavior is often associated with adversaries attempting to evade security detection by excluding malicious files or processes from being scanned by Microsoft Defender.
Detects suspicious command-line patterns typically used for downloading or executing malicious payloads, such as curl, base64 encoding, and PowerShell web requests, when spawned directly from Node.js or Visual Studio Code processes. This behavior is associated with supply chain compromises and loader activity (e.g., WaterPlum/Contagious Interview) targeting development environments.
Detects reconnaissance and situational-awareness collection commands (e.g., tasklist, systeminfo, wmic, powershell) executed by processes matching suspected persistence artifacts associated with known malicious activity (specifically referencing potential Telegram C2 tasking). The rule monitors common discovery utilities spawned by suspicious process names or paths.
Detects a coordinated malicious installation chain involving the creation of specific mutexes, establishment of persistence via Windows Registry Run keys, and subsequent tampering with Microsoft Defender exclusions using PowerShell. This sequence is indicative of the CHOSEN BRICK malware installation process.
Detects web traffic containing indicators of 'ClickFix' social engineering attacks. These attacks present a fake 'CAPTCHA' or verification prompt to the user and instruct them to copy and paste a malicious script (involving PowerShell or mshta) into their system terminal.
Detects processes spawned by Terraform or Go (e.g., during init, apply, or run) that exhibit suspicious access to local cloud credential files (AWS/Azure/GCP) or Terraform state files. This behavior is indicative of a malicious module attempting to exfiltrate cloud credentials from a developer's workstation or a CI/CD build host.
Detects high-risk destructive database operations (DROP, TRUNCATE, or UPDATE) on sensitive tables executed within six hours of a large outbound data transfer from the same host, a pattern indicative of anti-forensic database wiping following data exfiltration.
This rule detects potentially malicious usage of msiexec.exe where the command line contains obfuscation techniques such as excessive spacing, Unicode character substitution, or suspicious case variations. It specifically looks for activity initiated by common shell processes like explorer.exe or cmd.exe that involves the /package argument or URL-based loading, which is a common indicator of MSI-based payload delivery.
Detects the execution of 'ClickFix' or 'fake-CAPTCHA' patterns where a user is tricked into copying and pasting a malicious command into the Windows Run dialog. The rule specifically identifies the launch of conhost.exe from explorer.exe with --headless arguments, utilizing command-line tools like curl, iex, or irm to fetch and execute external payloads.
This rule detects unauthorized attempts to extract credentials from the Local Security Authority Subsystem Service (LSASS) process. It monitors for two distinct techniques: non-standard processes opening handles to lsass.exe with sensitive access rights (credential-dumping) and the use of rundll32.exe to invoke the MiniDump function within comsvcs.dll against lsass.exe.
Detects directory replication requests (Event ID 4662) using DS-Replication-Get-Changes or DS-Replication-Get-Changes-All GUIDs initiated by a computer account that is not a recognized domain controller. This behavior is indicative of a DCSync attack, where an adversary attempts to pull sensitive credential data directly from Active Directory.
This rule detects potential AS-REP Roasting activity by monitoring Windows Event ID 4768 (TGT Request). It identifies multiple Kerberos AS-REQ requests from a single IP address within a 10-minute window, where the PreAuthType is 0 (indicating no pre-authentication) and the encryption type is RC4 (0x17 or 23). This behavior is characteristic of enumeration and exploitation tools such as Rubeus or Impacket's GetNPUsers.py, which attempt to obtain extractable TGTs for accounts that do not require Kerberos pre-authentication.
This rule detects potential Kerberos Golden Ticket activity by monitoring Windows Event IDs 4768 (TGT Request) and 4769 (TGS Request) for indicators of forgery. Specifically, it flags TGT requests that utilize RC4 encryption ('0x17') in environments where AES is expected, excluding standard krbtgt account activity.
This rule detects the creation of services or execution of processes associated with remote management tools like PsExec or PAExec. It looks for common service names (PSEXESVC, PAExec), suspicious executable paths in temporary directories (e.g., \Temp\, \AppData\Local\Temp\), or command-line patterns indicating remote execution via ADMIN$ shares. These indicators are frequently used by adversaries for lateral movement and remote command execution.
Detects the use of native Windows utilities (vssadmin, wmic, wbadmin, bcdedit) to inhibit system recovery by deleting shadow copies, backup catalogs, or disabling automatic recovery features. This behavior is commonly observed in ransomware attacks.
This rule detects the use of native Windows utilities certutil.exe and bitsadmin.exe for potentially malicious purposes. Specifically, it flags certutil.exe being used for decoding or cached URL operations, and bitsadmin.exe being used to initiate file transfers from remote URLs or network paths. These tools are commonly abused by attackers for file staging, ingress tool transfer, and deobfuscation of malicious payloads.
This rule detects potential DNS tunneling activity by identifying DNS requests with suspicious characteristics, such as the use of TXT/NULL query types, high-entropy subdomains, or oversized queries. It further aggregates these suspicious requests per parent domain and flags scenarios where a high volume of requests or unique subdomains are observed, indicating possible data exfiltration or C2 communication.
Detects known components of the Sauron malware, including MSI installers, side-loaded executables (rnpkeys.exe), and malicious DLLs (rnp.dll, tdwp.dll) by matching known SHA-256 file hashes. It also includes a YARA rule for detecting PE binaries containing the string 'Sauron'.
Detects the presence of MSI installer packages associated with the Sauron Loader malware, which stage malicious files (rnpkeys.exe, rnp.dll, and tdwp.dll) into the C:\ProgramData\keyroll directory to facilitate DLL side-loading.
Detects suspicious behavior where an identical executable (same path and SHA256) is launched twice within a short window (60 minutes) following a system reboot, utilizing two distinct persistence methods: one triggered via the Task Scheduler (under svchost.exe -k netsvcs) and one via a user logon autostart mechanism (spawned by explorer.exe).
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